test-edit-retail-payment.php

<?php
// Подключим зависимые библиотеки (API RetailCRM)
require_once __DIR__ . '/vendor/autoload.php';
$site = 'https://site';
$apiKey = 'key';
$siteCode = 'TestCompany';
$arBy = ['id', 'externalId'];
$arTestPaymentData = [
    'externalId' => '38',
    'amount'     => 19800.00,
    'status'     => 'paid',
    'id'         => '95'
];
$clientRetailCRM = new \RetailCrm\ApiClient(
    $site,
    $apiKey,
    \RetailCrm\ApiClient::V5,
    $siteCode
);
foreach ($arBy as $by) {
    try {
        $response = $clientRetailCRM->request->ordersPaymentEdit($arTestPaymentData, $by, $siteCode);
        echo '<pre>'; print_r($response); echo '</pre>';
    } catch (\RetailCrm\Exception\CurlException $e) {
        echo 'RetailCRM_Api ordersPaymentEdit() ' . $e->getMessage();
    }
}

Вывод скрипта:

RetailCrm\Response\ApiResponse Object
(
    [statusCode:protected] => 403
    [response:protected] => Array
        (
            [success] => 
            [errorMsg] => Forbidden
        )

)
RetailCrm\Response\ApiResponse Object
(
    [statusCode:protected] => 403
    [response:protected] => Array
        (
            [success] => 
            [errorMsg] => Forbidden
        )

)